Posted by JDEM on May 18, 2019 at 15:50:14 from (47.33.231.52):
I posted awhile back about a Jubilee I bought in a junkyard for $800. It had been bought by the owner to run a brush-hog. He claimed it ran fine when he first got it. After not using it all winter, it never ran again. That was supposedly 6-7 years ago. He hired a mechanic from a local New Holland dealer to try to fix it and it seems the guy gave up. He was moonlighting and doing it at night and I don't know the whole story.
So, with good sheet metal and good tires? I told the owner I'd work on it at his yard and if I got it running and all seemed "not too bad" I'd buy it.
As I posted previously, engine tested at 80-90 lbs. compression on all four cylinders. Fuel system was so plugged I had to use drill bits to open it up. I have never seen gas-sludge get so hard before in less then 20 years. I got it running and it did not sound half-bad. Hydraulics work great and engine sounded tight. But it was skipping. I pulled the valve cover off and found over 1/4" of valve lash on one intake valve. I had at first suspected a cam-lobe had worn out. NOPE.
Ends up the valves will go up and down at cranking speed and thus why I got a decent compression reading. But once the engine starts - two intake valves hang up. Sometimes a pushrod would fall out of place when an intake valve hung up.
So, I first pulled the valve springs off from up top and tried to move the two intake valves. They were real stuck and no remedy from up above.
So I pulled off the head. Ends up I had to drive out the two valves with a punch. Looking at the head, it is obvious it was redone and has all new hardened seat inserts. It also had umbrella valve-stem seals on the intakes that I doubt Ford used in the 50s.
So it is all apart. The problem is some odd-ball black gun or resin on the intake valve stems. None on the exhaust valve stems. Note the throttle shaft on the carburetor was also stuck with what looked like the same black gum. I have never seen anything quite like this. Some odd additive in the gasoline that turned bad maybe? No signs of corrosion or rust anywhere and the engine was super clean inside other then this.
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